1221210023103 has 48 divisors (see below), whose sum is σ = 2171475111936. Its totient is φ = 645961599360.

The previous prime is 1221210023081. The next prime is 1221210023119. The reversal of 1221210023103 is 3013200121221.

1221210023103 is a `hidden beast` number, since 1 + 221 + 210 + 0 + 231 + 0 + 3 = 666.

It is not a de Polignac number, because 1221210023103 - 2¹⁴ = 1221210006719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210023153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13548550 + ... + 13638387.

It is an arithmetic number, because the mean of its divisors is an integer number (45239064832).

Almost surely, 2^{1221210023103} is an apocalyptic number.

1221210023103 is a deficient number, since it is larger than the sum of its proper divisors (950265088833).

1221210023103 is a wasteful number, since it uses less digits than its factorization.

1221210023103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27187004 (or 27187001 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1221210023103 its reverse (3013200121221), we get a palindrome (4234410144324).

The spelling of 1221210023103 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, twenty-three thousand, one hundred three".